据文献记载，黑麦秆蝇［Ｏｓｃｉｎｅｌａｆｒｉｔ（Ｌ．）］分布在我国西北、华北地区，主要危害小麦等麦类作物，也寄生多种禾本科杂草，偶害玉米。近年来，我们发现黑麦秆蝇在山西一些玉米种植区已成为玉米苗期不可忽视的重要害虫。危害玉米幼苗生长点形成枯心；枯心株... According to the literature, the rye flies [Oscinelafrit (L.)] are distributed in the northwestern and northern regions of our country, and are mainly harmful to wheat and other wheat crops. They also parasitize many kinds of grass weeds and even harm corn. In recent years, we found that rye flies and mullets have become an important pest that can not be ignored in maize seedling stage in some maize-growing areas in Shanxi Province. Endanger the growth of corn seedling point to form dry heart;